/*******************************************************************************
 * Copyright (c) 2005, 2014 springside.github.io
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 *******************************************************************************/
package cn.dakaqi.test.service.task;

import cn.dakaqi.entities.Task;
import cn.dakaqi.utils.redis.RedisClientTemplate;
import cn.dakaqi.test.repository.TaskDao;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Sort;
import org.springframework.data.domain.Sort.Direction;
import org.springframework.data.jpa.domain.Specification;
import org.springframework.stereotype.Component;
import org.springframework.transaction.annotation.Transactional;
import org.springside.modules.persistence.DynamicSpecifications;
import org.springside.modules.persistence.SearchFilter;
import org.springside.modules.persistence.SearchFilter.Operator;

import java.util.List;
import java.util.Map;

// Spring Bean的标识.
@Component
// 类中所有public函数都纳入事务管理的标识.
@Transactional
public class TaskService {

	@Autowired
	private TaskDao taskDao;

	@Autowired
	private RedisClientTemplate redisClientTemplate;

	public Task getTask(Long id)
	{
		String key = "Task-"+id;
		boolean F = redisClientTemplate.exists(key);
		if(F)
		{
			System.out.println("-------------from redis--------------->"+redisClientTemplate.get(key));
		}
		else
		{
			System.out.println("-------------from DB -----------------");
			redisClientTemplate.set(key, "张春洋");
		}
		return taskDao.findOne(id);
	}

	public Task getTask2(Long id) {
		Task task = null;
		String key = "Task-"+id;
		boolean F = redisClientTemplate.exists(key);
		if(F)
		{
			System.out.println("-------------from redis---------------");
			JSONObject jsonObject = JSON.parseObject(redisClientTemplate.get(key));
			jsonObject.remove("roleList");
			task = JSON.toJavaObject(jsonObject,Task.class);
		}
		else
		{
			System.out.println("-------------from DB -----------------");
			task = taskDao.findOne(id);
			redisClientTemplate.set(key, JSON.toJSONString(task));
		}
		return task;
	}

	public void saveTask(Task entity) {
		taskDao.save(entity);
	}

	public void deleteTask(Long id) {
		taskDao.delete(id);
	}

	public List<Task> getAllTask() {
		return (List<Task>) taskDao.findAll();
	}

	public Page<Task> getUserTask(Long userId, Map<String, Object> searchParams, int pageNumber, int pageSize,
			String sortType) {
		PageRequest pageRequest = buildPageRequest(pageNumber, pageSize, sortType);
		Specification<Task> spec = buildSpecification(userId, searchParams);

		return taskDao.findAll(spec, pageRequest);
	}

	/**
	 * 创建分页请求.
	 */
	private PageRequest buildPageRequest(int pageNumber, int pagzSize, String sortType) {
		Sort sort = null;
		if ("auto".equals(sortType)) {
			sort = new Sort(Direction.DESC, "id");
		} else if ("title".equals(sortType)) {
			sort = new Sort(Direction.ASC, "title");
		}

		return new PageRequest(pageNumber - 1, pagzSize, sort);
	}

	/**
	 * 创建动态查询条件组合.
	 */
	private Specification<Task> buildSpecification(Long userId, Map<String, Object> searchParams) {
		Map<String, SearchFilter> filters = SearchFilter.parse(searchParams);
		filters.put("user.id", new SearchFilter("user.id", Operator.EQ, userId));
		Specification<Task> spec = DynamicSpecifications.bySearchFilter(filters.values(), Task.class);
		return spec;
	}


}
